网格下基于模糊逻辑的信任修正模型

A trust revision model based on fuzzy logic in grid environment

随着网格系统研究与应用的深入,网格环境下的信息安全问题成了一个突出矛盾.针对主观信任的模糊性,运用模糊逻辑理论对网格环境的信任管理问题进行建模,给出了主观信任的描述机制和信任的评价机制,对信任的传递过程进行推理,综合考虑节点的历史信息,使信任度的计算更加符合实际.同时,针对网络中普遍存在的恶意推荐与攻击,给出了有效的防止策略.

With the deepening research and application of the grid system, the information security has become a prominent contradiction in the grid environment. For the fuzzy nature of subjective trust, this paper establishes a trust management model for grid environment with the theory of fuzzy logic. In this model, the description and evaluation mechanisms of subjective trust are given and the trust transfer process is reasoned. In the process of reasoning, the history information of the node is considered, so that the degree of confidence can be calculated more realisticly. Finally, an effective prevention strategy against the prevalent malicious recommendations and attack in the network is given.